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一、概述 5,5-二甲基海因,简称二甲基海因,DMH,其化学式为C_3H_8N_2O_2,分子量128,结构式:它是白色棱状结晶或结晶性粉末,熔点170-180℃,可以升华。易溶于水、10%水溶液pH值为4.5-5.5,溶于乙醇,乙醚及乙酸乙酯。微溶于异丙醇、丙酮等,不溶于脂肪烃和三氧乙烯。二甲基海因主要用于生1,3-二氯-5,5-二甲基海因(二氯海因),1-澳-3-氯-5,5-二甲基海因(澳氧海因),亦可用于生产羟甲基海因,高分子制造及氨基酸制造。例如生产海
I. Overview 5,5-dimethylhydantoin, referred to as dimethylhydantoin, DMH, whose chemical formula is C_3H_8N_2O_2, molecular weight 128, structural formula: it is white prismatic crystal or crystalline powder, melting point is 170-180°C. sublimation. Soluble in water, pH value of 10% aqueous solution is 4.5-5.5, soluble in alcohol, ether and ethyl acetate. Slightly soluble in isopropanol, acetone, etc., insoluble in aliphatic hydrocarbons and trioxyethylene. Dimethylhydantoin is mainly used for the production of 1,3-dichloro-5,5-dimethylhydantoin (dichlorohydantoin), 1-oxazol-3-chloro-5,5-dimethylhydantoin ( Oxygen Hydrate) can also be used to produce Hydroxymethyl Hydantoin, Polymer Manufacturing and Amino Acid Manufacturing. For example, producing sea